Despite advancements, such as the U.S. Navy’s HELIOS system and the Army’s IFPC-HEL, today's lasers can't yet reliably stop hypersonic threats.

https://archive.is/2024.08.05-032033/https://nationalinterest.org/blog/buzz/us-military-freaked-lasers-are-no-secret-weapon-against-hypersonic-missiles-207436

  • Frank [he/him, he/him]
    ·
    4 months ago

    My non-expert opinion is there's no way you could keep a laser painted on a target manuevering at mach 13 long enough to actually melt it. How long do they even have between detection and impact? DEWs are appealing because they travel at light speed and don't need to carry ammo. ___ but you have to hold your flash light on the target until it heats up enough to fail. That's fine if you've got a cruise missile puttering along at a stately pace, but not a terminally manueverable hypersonic vehicle.

    • knightly [none/use any]
      ·
      4 months ago

      How long do they even have between detection and impact?

      Depends!

      Carrier groups usually have an AWACS plane on standby, and wikipedia suggests modern systems have a 400km detection range. Assuming the missile has a steady speed of Mach 13, that's about 90 seconds of warning.

      It's more complicated than this, though, because (afaik) these missiles cruise at a much lower speed and only reach maximum velocity when accelerating in their terminal guidance phase.

      • PolandIsAStateOfMind@lemmy.ml
        ·
        4 months ago

        There's also the issue of laser range, which would probably be not very far, closer to the hypersonic missile last phase of attack range.

        • knightly [none/use any]
          ·
          4 months ago

          Yep! Line of sight alone would limit laser countermeasures to the horizon, to say nothing of the air scattering the beam's energy for the whole distance.

          But interceptors (anti-missile missiles) have no such limitation and would remain the only effective countermeasure for hypersonics.